In the grass family cotyledons are called

Concept-

• The cotyledons act as a food store in plant seeds.
• Cotyledons are often fleshy and full of reserve food materials.
• Based on the number of cotyledons vascular plants can be classified as Monocot and Dicot.
• Cot word represents the cotyledons, which means an embryonic leaf.
• Two different types of cotyledon are Monocotyledons and Dicotyledons.
• Monocot-
  • Monocotyledons are the angiosperms or the flowering plants in which the seeds typically contain only one embryonic leaf or Cotyledon.
  • Example- Ginger, onions, wheat, and grass.
• Dicot- 
  • Dicotyledons are the angiosperms or the flowering plants in which the seeds contain two embryonic leaves or cotyledons.
  • Example- All legumes including beans, lentils, pea, and peanuts.

Explanation-

In the grass family, the cotyledon is called scutellum.

• Embryos of grass are monocotyledons.
• The scutellum is situated towards one side (lateral) of the embryonal axis.
• At its lower end, the embryonal axis has the radical and root cap enclosed in an undifferentiated sheath called coleorhiza.
• The portion of the embryonal axis above the level of attachment of the scutellum is the epicotyl.
• Epicotyl has a shoot apex and a few leaf primordia enclosed in a hollow foliar structure, the coleoptile.

Additional Information

• The cylindrical portion below the level of cotyledons is hypocotyl that terminates at its lower end in the radicle or root tip.
• The portion of the embryonal axis above the level of attachment of the scutellum is the epicotyl.
• The fertile part of the seed is the tigellum.